Electrical conductors with



( Modem 2 Sheets-Sheet 1.

W. SIEMENS. HYDRAULIC PRESS FOR COVERING ELECTRICAL CONDUOTORS WITH SOFTMETAL.

N0. 399,291. Pat

III! IIHHHIH WITNESSES, INVENTOR, k) 59 MQVBQ Jrefinezl flyfi 7719724"'1 ,fl L a). Wm

Attorney,

(Nb Model.) 2 Sheets-Sheet 2-. W. $IEMENS.

HYDRAULIC PRESS FOR COVERING ELECTRICAL CONDUCTORS WITH SOFT METAL.

12X. :i ed Mar.12,1889.

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3% a 4/ 1%\ m M@ lJnTTnn STATES \VERNER SIEMENS, OE BERLIN, GERMANY,ASSIGNOR 'lO SIEMENS & IIALSKE, OF SAME PLACE.

HYDRAULIC PRESS FOR COVERING ELECTRICAL CONDUCTORS WITH SOFT METAL.

SPECEFICATION forming part of Letters Patent No. 399,291, dated M'arch12, 1889.

Application filed August 30, 1884. Serial No. 141,880. (No model.)Patented in Germany November 23, 1882, No. 23,176; in

Belgium November 28, 1882,1lo. 59,686, and in France November 28, 1882,No. 152,343.

To aZZ whom it may concern;

Be it known that I, WERNER SIEMENS, a subjectof the King of Prussia,German Emperor, and a resident of the city of Berlin, Prussia, Germany,have invented a new and useful lliydraulie Press for Cover-in gElectrical Conductors with Soitt- Metal, (for which I have obtained. apatent in the German Empire, No. 23,170, dated November 23, 1882; .inBelgium, No. 59,686, dated November 28, 1882, and in Fran ce, No. 152,34dated November 28, 1882,) of which the following is a specification.

i y invention relates to machines made use of for coveringelectric-circuit wires with a body of soft metal; and the nature thereofcon sists in constructing the hydraulic cylinder of annular form orcircular cross-section, for the purpose of arranging working parts ofthe machine in a central. space and enabling a strong and stiffcable-cover to pass through the press.

It also consists in so combining the plunger with the other parts of themachine that it can be moved laterally in order to allow the metalcylinder to be filled with metal.

Italso consists of mechanism for raising and lowering and for shorteningand lengthening the protecting tube or mandrel It also consists incombining, with. a protectin g tube or mandrel, an adjustable nipple orpoint, in order to produce a precisely concentric covering of theelectric conductors with soft metal; and, finally, it consists incertain novel combinations of parts, as will be hereinafter describedand clz'tin'ied.

In the accompanying drawings, li igure 1 is a longitudinal verticalsection of a hydraulic press having my improvements applied thereto, andin which shaft ll" is represented as being broken away in order to showthe shaft W beyond. Fig. 2 illustrates the adjustable point or nipple ofthe protecting tube or mandrel. Fig. represents a horizontal sectionthrough the chamber 0. Fig. 4: represents a horizontal sectioi 1 throughthe six-edged guidepiecc. Fig. 5 represents a horizontal section throughthe gear-wheels G Jr and internallythreaded. nut 31. Fig. (i representsa detail of the registering apparatus, and Fig. 7 is an enlargedsectional view of the base or bottom of the lower mandrel, I).

The cylindrical chamber C, for the reception of the n'ietal, is open atthe top and rests upon the piston E of the hydraulic cylinder I which isof annular'form or of circular crosssection, in order to form acylindrical space for working parts of the machine. To one of thecolumns ll of the frame a plunger, S, provided with a longitudinalcentral perforation, a, is hinged in such a manner that. it can berotated out of the way when a fresh supply of metal is to be placed inthe metal'chamber C, or when the annular shoulder attached to the bottomof the plunger 5 is removed or re placed. I

In the drawings the column ll is shown as forming a pintle on which. thebearings II, connected by braces ll to the plunger, rotate; but it isobvious that other equivalent devices may be used.

The soft metal is placed in the chamber C and the wire or cable ispassed through the tube or mandrel 1). It a fluid is forced into thepress in the usual manner, the piston will raise the chamber 0 and causethe bottom or annular shoulder M, attached to the bottom of the plunger,to press against the top of the soft metal in the chamber 0 and force itto escape in the shape of a tube, the outer diameter of which is equalto the diameter of the aperture of the annular shoulder, and the insidediameter of which is equal to the diameter of the upper edge of thenipple N. \Vhen the soft metal has been entirely formed into a tube, thepiston of the hydraulic press is forced downward and the plunger S isswung on its hinges, so that a fresh supply of metal may be introducedinto the chamber (1.

The hydraulic cylinder is secured to the cross-head K, which is providedwith a perforation, K, forming an extension of the perforation a in theplunger S, and is also secured to the cross-head K by columns or boltsll, which constitute the frame-work forming the remaining parts of themachine.

13y constructing the hydraulic cylinder F of annular form very strongand stiff cables may be introduced into the press, and such constructionalso provides a central space for the parts which. regulate themovements of the mandrel D. The upper part ofthe latter projects intothe conically-formed bottom of the plunger S and forms therewith anoutlet for the soft metal.

As an explanation of the movements of the mandrel D, it may be said thatto fill the chamher 0 it is at first necessary to free its upper end forthe reception of the lead. This is done by swinging the plunger S to oneside; but before this can be performed the mandrel D must be lowered tosuch a length that it clears the lowest part of the plunger. Thisrequires a somewhat extensive movement, and is done by means of theshaft "W" and pinion G thereon, the said pinion gearing with the wheell, which in turn gears with the wheel M. The wheel M is of a cylindricalshape, with a female screw-thread upon the inner surface of itsperiphery, and is screwed over the tube T, on which is a malescrew-thread, and which surrounds the lower part of the lower mandrel,D. Upon the upper edge of the said tube T rests the rim B, formed uponthe mandrel D, the said tube T being prevented from turning by a key, Tresting in a keyway cut in the lower part of the press. Therefore, ifthe shaft W is turned, the gearwheels G, Jr, and M turn therewith, andthe tube T screws up or down within the wheel M, thus imparting acorresponding motion to the mandrel. Consequently for charging thechamber the whole mandrel must at first be lowered by means of the shaftW", and afterthe chamber is charged raised again until the rim B ispressed against the bearings, as shown in Fig. 7.

It is sometimes necessary during the manu facture of a cable to changeat will the thickness of the metallic outside protection there of, whichis effected by shortening or lengthening the protecting tube or mandrelduring the working of the press, the thickness of the metal beingincreased by shortening the mandrel and decreased by lengthening it.

In order to effect a change in the length of the mandrel, a shaft, \V,is provided with a wheel, P, which gears with the wheel P upon the lowerpart of the mandrel D, the upper part of the said mandrel beingprevented from turning by the six-edged guide-piece F,

and being screwed into the lower part at A. If the shaft and with it thelower part of the mandrel, is turned, the upper part of the latterscrews itself in a direction correspond ing to the direction of rotationinto the lower part, thus shortening itself, or screws itself outward,and thus lengthens itself, and thus the width of the outlet for softmetal, which is formed by the plunger and mandrel, may be accuratelyadjusted. By a registering apparatus connected with the shaft V thethick ness of the metal, which changes according to the number ofrotations of the shaft, may be ascertained. The said registeringapparatus may consist of any of the many well known forms for recordingthe rotations of a shaft.

That part of the mandrel D on which during the working of thehydraulicpress the pressure of the metal acts is, in consequence of the differentdensities of the soft metal, liable to be moved out of the true axis ofthe metalehamber and pressed against the bottom of the plunger, in whichcase the metal covering is no longer concentric with the cable. In orderto avoid this, the top. of the mandrel D has a cap, 0, thereon,the saidcap having a spherical head, which forms a seat for the nipple N, thebottom of which is made to correspond thereto, thus permitting thenipple to have a certain freedom of movement. In consequence of thisconstruction, the nipple is always precisely in a position correspondingto the axis of the piston, and the lateral di location of the mandrelcan have no effect on the concentric form of the outlet for the metal.The form of the sides, as well as of the base of the nipple, is sochosen that in work ing, the pressure of the metal on it is alwaysgreater than the friction, and thus a rising of the nipple is preventedand a perfectly tight contact between the cap and the nipple secured.

l-lavin g now described my invention, 1 claim. and desire to secure byLetters Patent-- 1. In a hydraulic press for covering electricalconductors with soft metal, an annular cylinder having a central spacefor the reception of the mandrel, and the mandrel having an upper part,D, which screws into the lower part, D, as and for the purposedescribed.

2. In a hydraulic press for covering electrical conductors with softmetal, the combination of a plunger, rotated in a plane perpendicular tothe direction of the mandrel, with a mandrel capable of being raised andlowered, as and for the purpose described.

3. The combination of the nipple movable in relation to the mandrel, themandrel, and the perforated plunger, as and for the purpose described.

4. In an apparatus for making insulated telegraph cables and wires, thecombination of the hinged plunger S, capable of horizontal movement, andthe chamber 0, as and for the purpose described.

5. The combination of the mandrel D, the chamber C, and the hingedplunger S, capable of horizontal rotation, as and for the purposedescribed.

6. The combination of the annular cylinder F, the chamber 0, the annularpiston E, and the mandrel passing axially through the chamber, as andfor the purpose described.

7. The combination of the annular cylinder F and the tube for thereception of the cable or wire passing axially through the cylindricalspace in the center of cylinder, as and for the purpose described.

8. The combination of the plunger, having a central passage or openingtherein corresponding in form to the desired exterior form.

of the cable or com'luetor, with a Vertically adjustable mandrelPl'OYltlOtl with an adjust. able point, as and for the purposedescribed.

9. The combiuatimi of the plunger S, capa ble of beingrotated about thecolumn ll, the cross-head K, provided with a perforatiomK, and thelead-chamber (l, as and for the purpose described.

1 0. The combination of the mandrel, the perforated plunger, and thenipple N, as and for the purpose described.

11. The combination of the chamber 0, pro yided with a hole for thepassage of the mandrel, the piston E, supporting the cylindricalchamber, and the cylindm- F, as and for the purpose described.

12. In ahydraulie press for covering electrical conductors with softmetal, the combination of the upright column ll, the rotatable plungerH, the bearings Ii H, and the braces 11 as and for the purposedescribed.

i1 3. In a hydraulic pr ,ss for em'ering'eleetrical conductors with softmetal, the combination of the shaft W, provided with a gear, G, thewheel G, and the toothed nut 11, the tube 'l, and the lower part of themandrel having a shoulder, B, as and for the purpose described.

14:. In a hydraulic press for covering electrical conductors with softmetal, the combination of the shaft provided with a gear, 1, the wheelP, the lower section of the mandrel D, and the uppersection of themandrel l), which is received into the lower section, as and for thepurpose described.

1 5. The combination of the six-edged guide piece 1 and the mandrelconstructed in two sections, one of which screws into the other, as andfor the purpose described.

In testimony that I claim this as my own I have hereunto set my name inthe presence of two subscribing witnesses.

WERNER- SIEMENS.

\Vitnesses:

13. R01, JoHN R. RosLYN.

